The Development Squad went down to Barnsley in the PDL2 at Solihull Moors on Monday afternoon.
Beale said it was tough to take for his charges as Gary Rowett and his backroom staff looked on with interest.
"In the second-half we threw everything at them and didn't score. What I said to the lads in the changing room is on games like that when it doesn't happen - and even more so last week - make sure we draw the game.
"That's two weeks running we've conceded a goal and lost a game we shouldn't have lost.
"It was a disappointing result again. Certain parts of the performances were pleasing, although we have got a lot work to do."
Blues lost to Crewe Alexandra a week ago by the same margin.
Beale said despite having to finalise his side late on, it was the nature of the beast.
"Often at this level it's individuals filling holes and I say to the boys 'make sure you don't get frustrated if the pattern isn't perfect'.
"It's not always going to be a perfect team performance because sometimes it's a team that's put together the day before and away you go. That's just the way it is with development football. You have got to be able to adapt in those circumstances and stand out."
The Under-23s are in action again on Saturday when they take on Stoke City at Nuneaton Town's Liberty Way ground in the Premier League Cup (11am).
The two games a week schedule replicates what the seniors have to go through.
Said Beale: "That's something that's good for the boys. We did 46 games last year - exactly the same as the First Team - we are going to try to do the same this year to try and test them and make them durable.
"They have got to recover quickly in the next couple of days and dust themselves off for what will be a really, really tough game again against a Premier League team.
"That's why we are in the game - to have challenges. Even at this level you step into your next game and try and perform better than you did in your last game.
"If as individuals they can do that and constantly perform better and better that's how they get into the First Team - not by being in a team that wins every game, it's not about that.
"It's about them getting better game in game out, being one of the better players on the pitch and impressing the manager when he comes and watches."